Yasuda is the pro who has popularized the use of Capture Go for introducing children to the game and as a therapeutic activity in institutions for the elderly and the mentally handicapped.
From the opening blurb in Go as Communication:
"Born in Nakama, Fukuoka prefecture in 1964, Yasuda studied under Mr. Yusuke Oeda, a nine dan professional Go player, and succeeded in his aim of becoming a professional in 1985. He won the four dan section of the Kisei tournament in 1985. He was promoted to nine dan, the highest rank of professional players, in 1998."